Ответ:
60/27Co---->0/-1e+60/28Ni
===========================
N/No=2^(-t/T)=2^(-10.6/5.3)=1/4
==========================
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Ответ:
60/27Co---->0/-1e+60/28Ni
===========================
N/No=2^(-t/T)=2^(-10.6/5.3)=1/4
==========================